Locomotive-furnace arch.



C. B. MOORE.

LOCOMOTIVE FURNACE ARCH:

APPLICATION FILED 050.18, 1911.

Patented May 4,-191'5.

WITNESSES: q "Mir/10R Tram/gs? serv an A if? CHARLES E. MOORE, F EVANSTQN, ILLKNOIS, ASSIGHGE, BY- MESNE ASSIGNMENTS,

T0 AMERICAN ARCE CQIJIPANY, 0F NE'W YUlfc-K, N. Y., A CORPORATION OF DELA- "WARE.

Application filed December 18, 1911.

To all whom it may concern:

Be it known that l, C r-menus B. Moore, a citizen of the United States, and resident of Evanston, Cook county, Illinois, have invented certain new and useful Improvements in Locomotive-Furnace Arches, of which the following is a specification.

My invention relates to improvements in locomotive boiler fireboxes and has particular reference to refractory bafiies or so-called arches for installation and use in locomotiie boiler fireboxes.

The general objects of my invention are to provide an arch or an arch'eonstruction by means of which arches can be rapidly and easily built in locomotive boiler tireboXes, and particularly in such boxes as equipped with a plurality of parallel or stantially parallel water-circulatio tubes without the necessity of providing ccial bricks or for fitting the bricks to con with any slight inaccuracy of the spacing ot the tubes; to provide an arch which, while adding to the firebox the desirable features of such arches, will not diminish, to any appreciable extent, the efliciency of the circulating tubes as means for transmitting the heat of the fire to the water of the boiler; to provide an arch which, when once placed in position, will be locked against displacement transversely in the firebox in all of its parts, and which will be so formed that it will materially enhance the combustion of the firebox gases.

A further object of my invention is to provide an arch for use in locomotive fireboxes which will be easy to construct and repair, and parts of which can be readily removed to give access to the flue sheet and side sheets of the lirelios. when repairs to these parts are necessary, without disturbing the main portion of the arch.

My invention consists in a refractory ar h for locomotive boilers having the features and fulfilling the objects above outlined t gether with others which, will appear hero in, and all. as hereinafter fully described and particularly pointed out in the appended claims.

. M invention will be more readily understood by reference to the accompanying drawings in. which I have illustrated a loco- Specification of Letters Patent.

Patented Way 4 i915.

Serial No. 866,344.

motive boiler firebox equippedwith an arch built in accordance with my invention and in which:

Figure 1 is a central longitudinal section of the firebox; Fig. 2 is a horizontal section the firebox on the line 22 of Fig. 1; Fig. 3 is a vertical section of the firebox on the line 33 of, Fig. 1; and Fig. 4: is a transverse sectionof the arch on the line t4 of Fig. 1.

In the actual p notice of installing arches in boilers having a plurality of parallel water-circulating tubes it frequently occurs that, although the tubes are intended and supposed to be spaced regularly apart and also to be parallel, they are for one reason or another not accurate in their spacing and consequently when arch bricks which are groirved at their ends to rest upon two adjacent tubes are used, it occurs thatin portions the firebox the tubes will be too far apart to properly support the bricks and in other portion. the tubes will be too close together and w'illconsequently. not allow the tubes to be positioned properly in the plane of the arch. When the tubes are too closetogether it necessitates the trimming of the bricks which is not only expensive but very unsatisfactory. 7

Among other advantages inherent in'my arch ,isflythat the above diiiiculty is removed and t the spacing of the tubes is only fairly accurate, arches may be built in accordance with my invention as rapidly as bricks can be passed into the firebox and laid in position. Further, as the bricks of which my arch. composed do not encircle the tubes, but upon their upper sides or surfaces, substantially the whole of the surfaceof the tubes exposed to the high temperature of the ti )OX gasesand consequently themaximum r icienry ot the tubes is developed.

My invention capable of being used in tlr" roductiou at arches occupying different prs ions in fireboxcsaml havingvarying :l'unctions and, although I have confined the illustration of my invention to so-callcd front arches itshould be understood that my invention is not thus limited.

The principal functions of front arches are to serve as balllc walls located in the path of the firebox gases as they flow from the v and I add to i i.

' These tubes P 1 arch es lo feature by providtho arch with many and ing the undorsidc of subsidiary mixing pockets,

which no; only $4 the flow oi the arch, portioos a gases to ho .fiL

A lOCOHJOlDl WU drawings, consis sheets 3-3, a 5. The mbo}; and tho r4 1' shoe-i1 is door or opening from the liur sheer increase front and ELiil' v 7 bill the. firo .mpcraturo of loose the elli- --produciug box and tho .l'iIGi money o1? gascs,

11 ii s r he urebm;

of two io is or forum d 7 3 being arch I bui..-"l my :11 of bricks A and bricks proper o and support; ing tubes, a be termed lo serve Szhc purp Wholo against firebox. Tho lurch rectangular in 1* vidual hr Jlil-S placed upon tho Eu space bctY-Jccu I t-pro at their onus upon the are limited. in sizc by th shall not bc-"soh' they can. be hand upon the i uhcs widctcrmincd by th 1 the dimension s :ulwru'hthe foutures l3 to be passod. of tho limbo gth that when hey will span the iuconi; rubs; 13rd rest 7 These bricks Fcaturos 1')? W they idually but id. in

several lcl or series of these bricks,

ouggirudinu: row or scrios of thesebricks v(l spaco be awecn two adjacent c p eferably abuts the flue *esrwzrrdly and upwardly, tho inclined portions of the 1d the arch reardlc of the firebox, arch. resulrs in the best disin the firebox. The

is Q Ly co-oxtonsivc with the and so proportion the bricks o tho spacial )f The tubes that the outer of" tho arch lie substantially the or crs of the two outer tubes. ck risks are similar to the arch. bricks A. is. "that cy are rectangular in shape but they disringmished from the arch. bricks 1;. suds will; a v partly on A ch-susy rest, an the space b "l socket or groove B or c tube and the adjacent sidc she l; o obo so that when they are pl CL 11o posirioro tom above with the sockeksd end on the tube, they assume an up- .irdly and oufiWzu-dly inclined position, lzhclr ouror cud. rcsring against the adjacent side shoot, Ti rocks those bricks of such a length tho they Weadgfugly engage the tube and. the sidc Tl 1 Le fOlfith l I o I pou and extend above the hubs and on bricks are in position shoulders or abutrctsiu the i'nuin or h imposition. trans tho inner ends moors whmi prsui.

middle, {MOE vorsol 1! the .l pro brie is m trausvcw o rows across the fire- Liro box such. row consisting of a middle porn composed of number of arch bricks A c r"ospouding with lilo spaces between the tubes, ud ii-W0 of uroh'locking bricks B, on 1 'cd utkzuoh ohd of the row. For LI oso of lio or She arch, I make bricks A with larg recesses or A in. their under sides- These re- 0 uoarl as lar 'c as tho bricks and briclts are thus pr 7 llcd. with thin, domu inal od or Walls A ahd A. are on. sho trousvorso edges of bricks and extend i arco on its under side and ahus scrvc as subsidiary bah'los to assist in tho admixingof ihc firebox gases and thcroturn of the fuel particles to tho grate. The locking bricks {no lilzowi provided with sockets orrecosses B mid w msrgi cl edges B which'serve a, like pi v .1 of arch\ lends readily to "theproduction of u'rchcs, paricularly s1 bio for shc fircboxes in which they built, (the various longii H *l. o;

no rob bricks can be built in that; ihcy are provided on ole rho tubes upon v hey are longer than mncr or sockctcd ends of isvcrscly of the ably arrange of the different longitudinal rows of bricks I may be of different depths. In Fig. l I have illustrated this formation of arch.

- near -the inner ends and consequently the arch as a whole is higher in the middle of the fi ebox than at the sides; or, in other words, the pockets A are deeper at the dle than at the sides of the arch. It is obvious that in fireboxes in which the arch tubes are at different heights I can make the arch itself level by varying the" mid- I heights of the various bricks, or I can vary the height of any portion of the arch in the same manner The bricks themselves, being formed with recesses or pockets, and the marginal walls being not reduced materially in strength, the weight of the arch itself is greatly reduced and consequently the possibility of damaging or injuring the tubes'by vibration of the arch is reduced. When it is desired to repair the side sheets or the flue sheet the bricks which rest upon the sheet, which is to be repaired, can readily be removed without disturbing the remainderof the arch. In order to prevent the bricks of the arch from becomin fused together in such a mannertha't the individual bricks cannot be removed readily, I cut away the ends of the bricks in such a manner that the contacting surfaces of the adjacent bricks, which lie above the tubes, are reduced to a minimum and the architself is provided on its upper surface with open ,V-shaped joints C between the longitudinal rows of bricks. These jointsare protected from the severest action of the fire bythe tube which lies directly beneath them and they are soon filled with cinders or ash carried over and.

upon the arch by the firebox gases and are thus protected against fusing or from being cemented togetherby the'slag which sometimes form's upon these arches.

As-many modifications of myinvention will readily suggest themselves to one skilled in the art, I do notlimit or confine my invention to the specific structures herein shown and described.

Having thus described my invention I claim as new and desire to secure by Letters Patent:

i 1. A locomotive boiler firebox and its longitudinal inclined arch tubes, in combination with a longitudinal row of upwardly and outwardly inclined refractory bricks interposed between each side sheet of the box and .the adjacent arch tube, each said brick having its lower inner end socketed upon its tube, and a refractory arch body resting upon and entirely above all said tubes with its edges in abutment .with said rows of bricks and thereby held against transverse movement in the firebox.

2. A locomotive boiler firebox and its longitu'dinal inclined'arch tubes, in combination with a longitudinal row of upwardly and outwardly inclined refractory bricks interposed between each side sheet of the box and the adjacent arch tube, each said brick having its lower inner end socketed upon its tube, and a refractory arch body resting upon and entirely above all said tubes with its edges in substantial abutment with said rows of bricks, said body being composed of. inverted box-like refractory bricks presenting-gas-mixing cavities in their undersides.

A locomotive boiler firebox and its longitudinal inclined arch tubes, in combination with a row of upwardly and outwardly inclined refractory bricks interposed between each side sheet of the box and adjacent tube, said bricks being Wedgingly self-secured between respective 'tubes and side sheets, and each said brick having strengthening ribs on its upper and lower edges and presentin a cavity of general triangular shape in Iongitudinal section.

4. A locomotive boiler firebox and its longitudinal inclined arch tubes, in combination with a row of upwardly and outwardly inclined refractory bricks interposed between-each side sheet of the box and adjacent tube, said bricksbeing wedgingly self secured between respective tubes and side sheets, each said brick being tapered from a thick end upon the tube to a thin end against the sidesheet and presenting a top of sub triangular form. 

